He could meet Bella. Since Forks is Bella's hometown in the 'Twilight' series. They might become friends or have some kind of adventure together.
There's a chance he meets Edward Cullen. Harry, with his magic, and Edward, with his vampire abilities, could have an interesting interaction. Maybe they'd be suspicious of each other at first.
Harry might also meet Charlie, Bella's father. Charlie could be curious about this strange new kid in town. And there could be other minor characters from Forks that Harry gets to know, like the other students at Forks High School. They would be quite different from the Hogwarts students he was used to.
He could meet Yugi Moto. Yugi is a key figure in Domino City and his connection with the spirit world might be really interesting to compare with Harry's magic. Also, he might run into Joey Wheeler, who could be either fascinated or a bit skeptical about Harry's magical powers.
Obviously, Percy would be the main character. There could also be some characters from the original Percy - related universe who might make an appearance to help him adjust or just to check on him. And from the Forks side, characters like Bella or Edward (if it's in the Twilight - Forks setting) could potentially cross paths with Percy. Maybe they become friends or foes depending on how the story unfolds.
Obviously, Harry is one of the main characters since the title mentions him. And depending on how the story goes, there could be characters from Forks as well. For instance, Bella Swan could be a main character if the story involves Harry interacting with the Twilight world. Also, the Cullens might play important roles, especially if Harry's presence in Forks affects their lives in some way.
There are many potential characters. The teachers at Forks High School for sure. Harry could have interesting conversations with them. Also, if there are any other supernatural beings in the Forks universe in this fanfiction, like werewolves, he could interact with them. And of course, the students who are into different clubs and activities at the school. He might bond with the science - loving students or those on the school newspaper team, sharing his own experiences from Hogwarts in a veiled way.
Well, perhaps Harry would face new challenges in Forks. He might encounter different supernatural beings there, like vampires or werewolves. Maybe he'll form new friendships or rivalries.
He could meet American witches and wizards. Maybe a friendly wizard who shows him around the American wizarding areas.
In this fanfiction, Harry might also meet Willow, a powerful witch in Sunnydale. Their interaction would be fascinating as they both have magical abilities but learned and practiced magic in very different ways. And of course, he could meet Xander, who might initially be skeptical of Harry but later become his friend as they fight side by side against the various threats in Sunnydale.
In this fanfiction, Harry could meet a French witch who is an expert in potion - making. She could teach Harry some new and unique potion recipes that are exclusive to the French wizarding world. He might also run into a group of French wizarding students who are a bit skeptical of this English wizard at first but then become his friends after getting to know him better.
Obviously, Harry Potter would be one of the main characters. And then there could be characters from Twilight like Bella Swan and Edward Cullen. Hermione and Ron might also show up to visit Harry in Forks, adding more wizarding elements to the story.
He could meet French pure - blood families who have their own long - standing traditions. For instance, there might be a family that has a special connection to a particular magical forest in France. Harry might also run into French wizards who are experts in potion - making, as France is known for its fine potions in the wizarding world.